Assembly Instructions For American Standard Pipe Thread Tapered (Nptf) Connections - JLG 1850SJ Service And Maintenance Manual

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SECTION 5 - BASIC HYDRAULIC INFORMATION & HYDRAULIC SCHEMATICS

Assembly Instructions for American Standard Pipe

Thread Tapered (NPTF) Connections.

1. Inspect components to ensure male and female port

threads are free of rust, splits, dirt, foreign matter, or

2. Apply a suitable thread sealant, such as Loctite 567, to

the male pipe threads if not already applied. Ensure the

first 1 to 2 threads are uncovered to prevent system con-

3. Assemble connection hand tight.

4. Mark fittings, male and female.

OVER TIGHTENING MAY CAUSE DEFORMATION OF THE PIPE FITTING AND

DAMAGE TO THE JOINING FITTING, FLANGE OR COMPONENT MAY OCCUR.

* ØA thread dimension for reference only.

** See FFWR and TFFT Methods subsection for TFFT procedure requirements.

Table 5-1. NPTF Pipe Thread

TYPE/FITTING IDENTIFICATION

1 1/4 - 11 1/2

1 1/2 - 11 1/2

NEVER BACK OFF (LOOSEN) PIPE THREADED CONNECTORS TO ACHIEVE

ALIGNMENT. MEET THE MINIMUM REQUIRED TURNS AND USE THE LAST

TURN FOR ALIGNMENT.

5. Rotate male fitting the number of turns per Table 5-1,

NPTF Pipe Thread. See FFWR and TFFT Methods for TFFT

procedure requirements.

NOTE: TFFT values provided in Table 5-1, NPTF Pipe Thread are

applicable for the following material configurations:

• STEEL fittings with STEEL mating components

• STEEL fittings with ALUMINUM or BRASS mating compo-

• ALUMINUM or BRASS fittings with STEEL mating compo-

• ALUMINUM or BRASS fittings with ALUMINUM or BRASS

mating components.

Turns From Finger

Tight (TFFT)**

Troubleshooting